Collar for gas tank filling pipes of service stations



FIG. 1 is a top perspective view of a collar for gas tank filling pipes of service stations, showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is an elevational view taken from one side thereof, the opposite side being the same as the side shown; and

FIG. 5 is a front elevational view thereof, the rear being the same as the front shown. 

The ornamental design for a collar for gas tank filling pipes of service stations, substantially as shown and described. 